Mitsubishi Electric PEH-P8YE Operating manual

TECHNICAL & SERVICE MANUAL
PEH-P8YE, PEH-P10YE
2000
Models
AIR-COOLED HEAT PUMPTYPE
PACKAGED AIR CONDITIONERS
<Indoor unit>
For use with the R407C

Page
Contents
11
11
1PRECAUTIONS FOR DEVICESTHAT USE R407C REFRIGERANT ....................................... 1
[1] Storage of Piping Material ...................................................................................................2
[2] Piping Machining ................................................................................................................. 3
[3] Necessary Apparatus and Materials and Notes on Their Handling ..................................... 4
[4] Brazing................................................................................................................................. 5
[5] Airtightness Test .................................................................................................................. 6
[6] Vacuuming ........................................................................................................................... 6
[7] Charging of Refrigerant ....................................................................................................... 7
22
22
2PART NAMES AND FUNCTIONS.............................................................................................. 8
33
33
3SPECIFICATIONS .................................................................................................................... 10
44
44
4PART NAMES AND FUNCTIONS............................................................................................ 12
55
55
5ELECTRICALWIRING DIAGRAM ........................................................................................... 14
66
66
6TECHNICAL DATATO MEET LVD........................................................................................... 15
[1] Capacity/Input Ratio against Changes in Room Airflow Rate............................................ 15
[2] Bypass Factor Curves........................................................................................................ 16
[3] Cooling Sensible Heating CapacityTable .......................................................................... 16
[4] Airflow Characteristic Curves............................................................................................. 17
[5] Center of Gravity (Indoor unit) ........................................................................................... 17
[6] NC Curve (Indoor unit).......................................................................................................18
77
77
7SERVICE DATA ........................................................................................................................ 19
[1] Appearance of Equipment ................................................................................................. 19
[2] Internal Construction ......................................................................................................... 19
[3] Refrigerant Circuit.............................................................................................................. 19
88
88
8FUNCTION OF SWITCH ON INDOOR CIRCUIT BOARD....................................................... 20
[1] DIP SW1 for model Selection (DIP SW1 has been set at factory)..................................... 20
[2] DIP SW2 for Capacity Setting (DIP SW2 has been set at factory) .................................... 20
[3] DIP SWE for Emergency Operation................................................................................... 20
99
99
9TEST RUN ................................................................................................................................ 21
[1] Before test run ................................................................................................................... 21
[2] Test run procedures ........................................................................................................... 21
[3] Self-diagnosis .................................................................................................................... 23
[4] Remote controller diagnosis .............................................................................................. 25

–1–
11
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1PRECAUTIONS FOR DEVICESTHAT USE R407C REFRIGERANT
Caution
Do not use the existing refrigerant piping.
• The old refrigerant and refrigerator oil in the existing
piping contains a large amount of chlorine which may
cause the refrigerator oil of the new unit to deterio-
rate.
Use refrigerant piping made of C1220 (CU-DHP) phos-
phorus deoxidized copper as specified in the *JIS
H3300“Copper and copper alloy seamless pipes and
tubes”. In addition, be sure that the inner and outer
surfaces of the pipes are clean and free of hazard-
ous sulphur,oxides,dust/dirt,shaving particles,oils,
moisture, or any other contaminant.
• Contaminants on the inside of the refrigerant piping
may cause the refrigerant residual oil to deteriorate.
Storethepipingto be used during installation indoors
and keep both ends of the piping sealed until just
before brazing. (Store elbows and other joints in a
plastic bag.)
• If dust, dirt, or water enters the refrigerant cycle, de-
terioration of the oil and compressor trouble may re-
sult.
Use ester oil,ether oil or alkylbenzene (small amount)
as the refrigerator oil to coat flares and flange con-
nections.
• The refrigerator oil will degrade if it is mixed with a
large amount of mineral oil.
Use liquid refrigerant to seal the system.
• If gas refrigerant is used to seal the system, the com-
position of the refrigerant in the cylinder will change
and performance may drop.
Do not use a refrigerant other than R407C.
• If another refrigerant (R22, etc.) is used, the chlorine
in the refrigerant may cause the refrigerator oil to de-
teriorate.
Use a vacuum pump with a reverse flow check valve.
• The vacuum pump oil may flow back into the refriger-
ant cycle and cause the refrigerator oil to deteriorate.
Do not use the following tools that have been used
with conventional refrigerants.
(Gauge manifold, charge hose, gas leak detector, re-
verse flow check valve, refrigerant charge base,
vacuum gauge, refrigerant recovery equipment)
• If the conventional refrigerant and refrigerator oil are
mixed in the R407C, the refrigerant may deteriorated.
• If water is mixed in the R407C, the refrigerator oil may
deteriorate.
• Since R407C does not contain any chlorine, gas leak
detectors for conventional refrigerants will not react to
it.
Do not use a charging cylinder.
• Using a charging cylinder may cause the refrigerant
to deteriorate.
Be especially careful when managing the tools.
• If dust, dirt, or water gets in the refrigerant cycle, the
refrigerant may deteriorate.
If the refrigerant leaks, recover the refrigerant in the
refrigerant cycle, then recharge the cycle with the
specified amount of the liquid refrigerant indicated
on the air conditioner.
• Since R407C is a nonazeotropic refrigerant, if addi-
tionallycharged when the refrigerantleaked,the com-
position of the refrigerant in the refrigerant cycle will
change and result in a drop in performance or abnor-
mal stopping.
*JIS: Japanese Industrial Standard

–2–
[1] Storage of Piping Material
(1) Storage location
Store the pipes to be used indoors.(Warehouse at site or owner’s warehouse)
Storing them outdoors may cause dirt, waste, or water to infiltrate.
(2) Pipe sealing before storage
Both ends of the pipes should be sealed until immediately before brazing.
Wrap elbows andT’s in plastic bags for storage.
* The new refrigerator oil is 10 times more hygroscopic than the conventional refrigerator oil (such as Suniso). Water
infiltration in the refrigerant circuit may deteriorate the oil or cause a compressor failure. Piping materials must be stored
with more care than with the conventional refrigerant pipes.

–3–
[2] Piping Machining
Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections.
Use only the necessary minimum quantity of oil !
Reason:
1. The refrigerator oil used for the equipment is highly hygroscopic and may introduce water inside.
Notes:
• Introducing a great quantity of mineral oil into the refrigerant circuit may also cause a compressor failure.
• Do not use oils other than ester oil, ether oil or alkylbenzene.